ADEN， Yemen， June 27 (Xinhua) -- The death toll from a series of suicide bombing attacks that struck military posts and an intelligence compound in Yemen's southeastern province of Hadramout rose to 40 deaths on Monday， Yemeni officials told Xinhua.

A source of the Fourth Regional Military Command based in Hadramout province said that a series of suicide bombings that targeted military checkpoints in different places in the city of Mukalla left about 40 soldiers killed and several others injured.

""About 40 were killed and dozens others injured according to the medical information coming from three public hospitals in Hadramout about the latest casualty figures of today's attacks，"" the source said.

Witnesses told Xinhua that three military checkpoints and an intelligence compound in the coastal city of Mukalla， Hadramout's provincial capital， were struck by huge blasts simultaneously.

The simultaneous explosions took place while the soldiers were gathering minutes before the time of breaking their day-long fast during the Muslim holy month of Ramadan， according to witnesses.